The MPLS WG Archive

[seenu@samsung.co.kr]

Hi Sandeep,

---> pls see the inline text.


Seenu
Samsung India Software Operations
Level 7, Prestige Meridian - II
M.G.Road, Bangalore, India.

Tel: +91-80-558 1281 ext: 268
=========================


I have a question on Label Space and its scope.
With reference to the following:

-------------------------------------------------------------
          draft-ietf-mpls-arch-07.txt

Page 16: section 3.14

[MPLS-SHIM] specifies that a different label space is used
            for unicast packets than for multicast packets, 
            and uses a data link layer codepoint to distinguish 
            the two label spaces.


------------------------------------------------------------

Q1. Does it mean that same Label Value (for example: say 0x100) 
    can be used in both MPLS Unicast Packet and MPLS multicast
    packets ?
    or
    The Labels will be different..?

----> Yes, you can have the same label value for both unicast and multicast....using  ether type value you can distinguish.
        And you need check both the Label and the ether type for a decision.
        But how you do it is implementation dependent...whether your hardware does it....or you need provide some software
        module for swithcing at L2 ( for existing Ethernet boards).

Q2. So, can the LSR have same Label value binding to 2 different types
    of L3 packet ?

----> I didn't get the question exactly. Diffrent types of L3 packet....?????

Thanks in advance for your kind help.
- Sandeep